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2 kg of ice at -20^@C is mixed with 5 kg...

2 kg of ice at `-20^@C` is mixed with 5 kg of water at `20^@C` in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific beats of water and ice are `1 (kcal)/(kg^@C)` and `0.5 (kcal)/(kg^@C)` while she latent heat of fusion of ice is `80 (kcal)/(kg)`

A

7 kg

B

6 kg

C

4 kg

D

2 kg

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TARGET PUBLICATION-Thermal Properties of Matter-Exercise
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